Can be posters, advertisements, videos/films and maybe national/revolutionary anthems/songs.
My favorites so far are:
"Is Colorado in america?" (Basically a US flag with various constitutional rights being
written as violated in the US flag's stripes in Colorado, including the 2nd amendment.)
"Daisy" (Lyndon B. Johnson campaign attack ad, implying that if you do not vote for LBJ, we would have nuclear war.)